Loader definitionConstruction of water and electricity&comma; ports&comma; mining and other engineering conditions of construction machinery&comma; it is mainly used to shovel&comma; sandstone&comma; lime soil&comma; coal and other material&comma; can also be used for ore&comma; hard soil&comma; such as mild shovel dug homework&period; Change of different auxiliary work unit can also be bulldozing&comma; lifting and other materials such as wood handling operation&period; During the construction of roads&comma; especially in the high grade highway&comma; the loader used in subgrade engineering fill dig&comma; asphalt mixture of aggregate and cement concrete yard and loading operations&period; It also can be a force behind the soil&comma; ground leveling and other machinery operation traction&period; Because the loader has operation speed&comma; high efficiency&comma; good maneuverability&comma; the advantages of convenient operation&comma; so it has become one of the main models of the conditions in the construction of engineering construction&period; Main components ofIncluding engine&comma; torque converter&comma; gearbox&comma; drive axle&comma; before and after referred to as "four items1&period; The engine2&period; On the torque converter has three pumps&comma; pump work &lpar;supply lifting&comma; skip pressure oil&rpar; steering pump to pressure oil &lpar;supply&rpar; variable speed pumps also called walking &lpar;for strain&comma; torque transmission pressure oil&rpar;&comma; some models on the steering pump is equipped with pilot pump control valve pilot pressure oil &lpar;supply&rpar;3&period;&period;&period;Working hydraulic oil&comma; hydraulic oil tank&comma; pump&comma; multi-way valve&comma; lifting oil cylinder and skip the oil cylinder4&period; The walking hydraulic system&colon; Transmission oil sump oil&comma; pump&comma; walking all the way into the torque converter valve all the way into gear&comma; transmission clutch5&period; Driver&colon; The shaft&comma; the main differential&comma; wheel reducer6&period; Turned to oil&comma; fuel tank&comma; steering pump&comma; steady flow valve &lpar;or valve&rpar; steering&comma; steering cylinder7&period; The gearbox is one of the &lpar;planetary&rpar; and fission &lpar;shaft&rpar; two kinds